Why do I blog?

A friend asked me why do I blog. I could give him several explanations, but the real reason is structured procrastination. My next research task is really boring: check the shape files of Brazilian counties from 1872 to 2000. A pain in the a**. Therefore I create new tasks to postpone this one. I procrastinate and, at the same time, I fell productive.
It is not the best productivity method, but it works.